Electronic iris, internal focusing mechanism, supports auto focus.
6 groups of 10 optical structure, including 1 ED lenses, 3 lenses with high refractive index and 1 aspherical lens.
Quiet STM focus motor, fast and accurate docusing
Beautiful natural bokeh: The F2.5 max aperture is ideal for low-light situations for maximum light gathering capability while also providing a shallow depth of field.
Supports EXIF information transmission and USB upgrade., more natural shots of subjects are possible thanks to the near-silent shutter sound.